| | | 1 | | using System.Text; |
| | | 2 | | |
| | | 3 | | namespace TeleFlow.Telegram.Internal; |
| | | 4 | | |
| | | 5 | | internal static class TelegramDeepLinkPayloadValidator |
| | | 6 | | { |
| | | 7 | | public const int PayloadByteLimit = 64; |
| | | 8 | | |
| | | 9 | | public static void Validate(string payload) |
| | | 10 | | { |
| | 21 | 11 | | ArgumentException.ThrowIfNullOrWhiteSpace(payload); |
| | | 12 | | |
| | 19 | 13 | | var byteCount = Encoding.UTF8.GetByteCount(payload); |
| | 19 | 14 | | if (byteCount > PayloadByteLimit) |
| | | 15 | | { |
| | 1 | 16 | | throw new ArgumentException( |
| | 1 | 17 | | $"Telegram deep-link payload must be at most {PayloadByteLimit} UTF-8 bytes.", |
| | 1 | 18 | | nameof(payload)); |
| | | 19 | | } |
| | | 20 | | |
| | 398 | 21 | | foreach (var character in payload) |
| | | 22 | | { |
| | 182 | 23 | | if (!IsDeepLinkPayloadCharacter(character)) |
| | | 24 | | { |
| | 2 | 25 | | throw new ArgumentException( |
| | 2 | 26 | | "Telegram deep-link payload can contain only ASCII letters, digits, '-' and '_'.", |
| | 2 | 27 | | nameof(payload)); |
| | | 28 | | } |
| | | 29 | | } |
| | 16 | 30 | | } |
| | | 31 | | |
| | | 32 | | private static bool IsDeepLinkPayloadCharacter(char character) |
| | | 33 | | { |
| | 182 | 34 | | return character is >= 'A' and <= 'Z' || |
| | 182 | 35 | | character is >= 'a' and <= 'z' || |
| | 182 | 36 | | character is >= '0' and <= '9' || |
| | 182 | 37 | | character is '-' or '_'; |
| | | 38 | | } |
| | | 39 | | } |